172220120 has 32 divisors (see below), whose sum is σ = 391266720. Its totient is φ = 68217600.

The previous prime is 172220107. The next prime is 172220129. The reversal of 172220120 is 21022271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172220129) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16781 + ... + 25020.

It is an arithmetic number, because the mean of its divisors is an integer number (12227085).

Almost surely, 2^172220120 is an apocalyptic number.

172220120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172220120 is an abundant number, since it is smaller than the sum of its proper divisors (219046600).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

172220120 is a wasteful number, since it uses less digits than its factorization.

172220120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41915 (or 41911 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 172220120 is about 13123.2663616952. The cubic root of 172220120 is about 556.3669144477.

Adding to 172220120 its reverse (21022271), we get a palindrome (193242391).

The spelling of 172220120 in words is "one hundred seventy-two million, two hundred twenty thousand, one hundred twenty".